1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef ASH_WM_DRAG_WINDOW_RESIZER_H_ 6 #define ASH_WM_DRAG_WINDOW_RESIZER_H_ 7 8 #include "ash/wm/window_resizer.h" 9 #include "base/compiler_specific.h" 10 #include "base/gtest_prod_util.h" 11 #include "base/memory/weak_ptr.h" 12 #include "ui/gfx/point.h" 13 14 namespace ash { 15 16 class DragWindowController; 17 18 // DragWindowResizer is a decorator of WindowResizer and adds the ability to 19 // drag windows across displays. 20 class ASH_EXPORT DragWindowResizer : public WindowResizer { 21 public: 22 virtual ~DragWindowResizer(); 23 24 // Creates a new DragWindowResizer. The caller takes ownership of the 25 // returned object. The ownership of |next_window_resizer| is taken by the 26 // returned object. Returns NULL if not resizable. 27 static DragWindowResizer* Create(WindowResizer* next_window_resizer, 28 wm::WindowState* window_state); 29 30 // WindowResizer: 31 virtual void Drag(const gfx::Point& location, int event_flags) OVERRIDE; 32 virtual void CompleteDrag() OVERRIDE; 33 virtual void RevertDrag() OVERRIDE; 34 35 private: 36 FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest, DragWindowController); 37 38 // Creates DragWindowResizer that adds the ability of dragging windows across 39 // displays to |next_window_resizer|. This object takes the ownership of 40 // |next_window_resizer|. 41 explicit DragWindowResizer(WindowResizer* next_window_resizer, 42 wm::WindowState* window_state); 43 44 // Updates the bounds of the phantom window for window dragging. Set true on 45 // |in_original_root| if the pointer is still in |window()->GetRootWindow()|. 46 void UpdateDragWindow(const gfx::Rect& bounds, bool in_original_root); 47 48 // Returns true if we should allow the mouse pointer to warp. 49 bool ShouldAllowMouseWarp(); 50 51 scoped_ptr<WindowResizer> next_window_resizer_; 52 53 // Shows a semi-transparent image of the window being dragged. 54 scoped_ptr<DragWindowController> drag_window_controller_; 55 56 gfx::Point last_mouse_location_; 57 58 // Current instance for use by the DragWindowResizerTest. 59 static DragWindowResizer* instance_; 60 61 base::WeakPtrFactory<DragWindowResizer> weak_ptr_factory_; 62 63 DISALLOW_COPY_AND_ASSIGN(DragWindowResizer); 64 }; 65 66 } // namespace ash 67 68 #endif // ASH_WM_DRAG_WINDOW_RESIZER_H_ 69